Update CHANGELOG.md

CHANGELOG.md

@@ -45,7 +45,7 @@ should change the heading of the (upcoming) version to include a major version b
 - Updated `computedDefaults` (used by `getDefaultFormState`) to skip saving the computed default if it's an empty object unless `includeUndefinedValues` is truthy, fixing [#2150](https://github.com/rjsf-team/react-jsonschema-form/issues/2150) and [#2708](https://github.com/rjsf-team/react-jsonschema-form/issues/2708)
 - Expanded the `getDefaultFormState` util's `includeUndefinedValues` prop to accept a boolean or `"excludeObjectChildren"` if it does not want to include undefined values in nested objects
 - Updated `mergeObjects` to add new `preventDuplicates` mode when concatenating arrays so that only unique values from the source object array are copied to the destination object array
-- Fix isObject to correctly identify 'Date' as not mergable with Object default value.
+- Fix `isObject` to correctly identify 'Date' as not an object, similar to 'File', thus preventing them from being merged with Object default values.
 
 ## Dev / docs / playground
 - Removed extraneous leading space on the examples in the validation documentation, fixing [#3282](https://github.com/rjsf-team/react-jsonschema-form/issues/3282)